Organic compounds -- part of the class 532-570 series – Organic compounds – Carbonate esters
Patent
1998-08-26
1999-05-11
Ambrose, Michael G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbonate esters
C07C68/00
Patent
active
059028947
ABSTRACT:
A process for producing dialkyl carbonates, such as dimethyl carbonate, from the reaction of a primary alcohol with urea in the presence of a novel organotin catalyst complex with a high boiling electron donor compound acting as solvent which are (1) materials having the general is independently selected from C.sub.1-12 alkyl, alkaryl or aralkyl moieties, k=0,1, 2 or 3 and m=1, 2, 3, 4 or 5 and (2) bidentate ligand which form 1:1 bidentate and/or 1:2 monodentate adducts with R'.sub.2 SnX.sub.2 (X=Cl, R'O, R'COO or R'COS), R'.sub.3 SnX, R'SnO, Ph.sub.3-n R'SnX.sub.n or Ph.sub.4-n SnX.sub.n (wherein R'=C.sub.q H.sub.2q-1 n=0, 1 or 2 and q=2 to 12) and mixtures thereof.
REFERENCES:
patent: 4327035 (1982-04-01), Heitz et al.
patent: 4360477 (1982-11-01), Hallgreen et al.
patent: 4435595 (1984-03-01), Agreda et al.
patent: 4851555 (1989-07-01), Weinstein
patent: 4939294 (1990-07-01), Agreda et al.
patent: 5231212 (1993-07-01), Buysch et al.
patent: 5534649 (1996-07-01), Cho et al.
patent: 5565603 (1996-10-01), Saleh et al.
patent: 5591883 (1997-01-01), Hwang et al.
W.J.Close & M.A.Spielman, "A Proposed Mechanism for the Conversion of Alcohols to Allophanates", Mar. 13, 1953, pp. 4055-4056, vol. 75, Contribution from Abbott Laboratories.
R.Schwalm, P.Ball, H. Fullman & W.Heitz, Urea as a Carbon Dioxide Source in the Synthesis of Carbonates and Polycarbonates and Polycarbonates, pp. 272-273, Federal Republic of Germany.
Luigi Cassar, "Dimethylcarbonate: a new intermediate for a cleaner future", La Chimica & L'Industria, pp. 18-22, Oct. 1989, Italy.
Y. Okada, T.Kondo, S.Asaoka, "Dimethyl Carbonate Production for Fuel Additives", ACS 212th National Meeting, Orlando, Aug. '96, pp. 868-872.
Herbert W. Blohm and Ernest I. Becker, "Allophanates", Chem. Laboratories of the Polytechnic Institute of Brooklyn, New York, Chemical Rev. 1952, 51, pp. 471-504.
Peter Ball, Heinz Fullmann, Reinhold Schwalm & Walter-Heitz, "Synthesis of Carbonates and Polycarbonates by Reaction of Urea with Hydroxy Compounds", C1 Mol. Chem., vol. 1, pp. 95-108.
John F. Knifton and Roger G. Duranleau, "Ethylene glycol-dimethyl carbonate cogeneration", Journal of Molecular Catalyst, 1991, pp. 389-399.
Michael A. Pacheco and Christopher L. Marshall, "Review of Dimethyl Carbonate (DMC) Manufacture and Its Characteristics as a Fuel Additive", Energy & Fuels, 1997, 11, 2-29.
Ambrose Michael G.
Catalytic Distillation Technologies
Johnson Kenneth H.
LandOfFree
Process for making dialkyl carbonates does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for making dialkyl carbonates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making dialkyl carbonates will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-246201